Ephesians 4:29,30

Let no corrupt communication Or discourse, dictated by corruption in the heart of the speaker, and tending to corrupt the minds or manners of hearers; proceed out of your mouth At any time, or on any occasion. The original expression, λογος σαπρος, is literally, rotten or putrid speech; that is, speech offensive to the hearers, or calculated to infect them with sin; and is in direct opposition to that which is seasoned with salt, and is recommended (Col 4:6) as tending to preserve persons from corruption. The apostle does not merely include in this expression obscene discourse of every kind, but also all flattery, calumny, railing, boasting, tale-bearing, backbiting, commendations of vice and impiety, profane jestings on religion, its ministers and professors, trifling conversation; and, indeed, all discourse that is not either about necessary business, or, as the next clause expresses it, is not good to the use of edifying Calculated to instruct, direct, reprove, encourage, excite to duty, comfort, or in some way edify and minister grace to the hearers. And grieve not By any act of disobedience, particularly by any kind of corrupt discourse, or by any of the following sins; the Holy Spirit of God The original expression is very emphatical, το Πνευμα, το αγιον, του Θεου, the Spirit, the Holy Spirit, of God. Grief is ascribed to the Holy Spirit here metaphorically; for, strictly speaking, he is incapable of pain or disquiet of any kind. But he acts, on the occasion referred to, as men do who are grieved. And the purport of the caution is, Do not cause him, by any sinful temper, word, or work, to withdraw from you, as a friend does whom you grieve by unkind or improper behaviour. The expression conveys a strong idea of the love which the Holy Spirit bears to men in general, and to the disciples of Christ in particular; and of his desire to promote their salvation. Whereby ye are sealed unto the day of redemption The time when you shall receive the redemption of your bodies from the grave; (Romans 8:23;) shall be acquitted at the judgment-seat of Christ, fully delivered from all the consequences of sin, and made perfectly and unchangeably happy: the day when your redemption will be fully completed. See note on Ephesians 1:13.